Process of desiccation.



G. A. KRAUSE.

PROCESS OF DESICCATION. APPLICATION FILED JULY 28, I913.

Llfifin Patented Dec. 28, I915.

By my fiiforna s tit , GEORG- ALEXANDER KRAUSE, 0F MUNICH, GERMANY.

JPROCESS 0F DESICCATION.

messes.

Specification of Letters Patent.

Patented Dec. 2a, iaia.

Application filed July 28, 1913. Serial No. 781,700.

To all whom it may concern:

Be it known that I, GEORG ALEXANDER KnAUsE, a subject of the Emperor of Germany, residing at 21 Steinsdorferstrasse,

Munich, Bavaria, Germany, have invented certain new and useful Improvements in' and in modes of bringing about chemical reactions such as oxidation and reduction.

Processes are already well known, in which liquids are directed in a finely divided state against a current of hot air or gas in order to concentrate or completely evaporate the same. In consequence of the material moving in a direction opposite to the air and owing to its contacting with the air or the like which is already saturated, the drying process is imperfect.

According to my invention the drying medium, 71. e. air or gas, is supplied at an angle to the material spread out in a layer. The material to be dried is rapidly liberated from its moisture as it constantly contacts with fresh air or gas.

Two forms of apparatus for carrying my invention into practice are represented by way of example in the accompanying drawing, wherein:

Figure 1 shows an apparatus in which the hot air or gas is introduced at the periphery of a container, and Fig. 2 shows another form in which the hot air or gas is introduced in the middle of the container.

Referring firstly to Fig. 1, the apparatus comprises a container A closed on all sides and having a tapering bottom portion B for containing the material to be dried. The drying medium, 2'. c. the current of air or gas requisite for the evaporation or inspissaand is uniformly distributed in the form of a fine mist horizontally in all directions by the nozzle. The layer of mist which is formed descends slowly corresponding to its specific gravity through the upwardly rising drying medium and is thereby dried, the drying medium becomes loaded with the solvent or vapor hereby produced and escapes upward, while the dry powder or concentrate which is produced falls out of the zone of the mist, possibly through some more drying agent met with in its path, into the space in the portion 18. The drying medium, 6. 9. air or gas, saturated with moisture escapes from the container through suitable outlets G, which are preferably'rather larger than the inlets D, and passes away through the pipe H. As indicated by the lowerarrows, the air will pass through the layer of liquid principally at the periphery thereof where it is relatively thin owing to its being spread out.

Referring now to Fig. 2, in this formof apparatus the drying mediumis supplied through the middle of the container and travels along the path indicated blw arrows.

For drying the material, either air may be used or any suitable gas which, under certain circumstances, is itself to act on the substances to be vaporized or inspissated, or is to protect sensitive substances from the action of the air. The temperature of the entering current of air or gas may be as high tion, is supplied through one or more pipes.

C to a row of inlets D into the container. The air or gas rises slowly corresponding to its specific gravity. An'atoinizer F is arranged in the middle of the container A above the inlets D and throws the material to be dried outward in a layer toward all sides, as indicated by the upper arrows. This atomizer may be of any suitable kind, say a nozzle, a nebulizer, a rotating disk or the like, onto which the material is conducted. The liquid to be dried flows from a tank through the pipe E into the nozzle F as desired and will depend on its natural drying or evaporating power and on the medium to be vaporized, or on the sensitiveness of the dissolved substance.

I claim 1. A method of subjecting liquid to the action of gas which consists in dispersing the liquid outward in all directions in a substantially horizontal sheet of spray and passing slowly upward principally through the outer or peripheral portions of the spraysheet a gaseous agent of the character specified, substantially as described.

2. A method of subjecting liquid to the action of gas which consists in leading the liquid to the center of the upper portion of a chamber, and there dispersing it outward in all directions in a substantially horizontal sheet of spray, discharging into the, lower portion of the chamber a gaseous agent of the character specified in such manner that it passes slowly upward through principally the outer portions of the spray sheet, and

, stantially as described.

3. A method of subjecting liquid to the action of in all directions in a substantially horizontal sheet of spray, discharging into the lower portion of the chamber a gaseous agent of the character specified in such manner that it passes slowly upward through principally the outer portions of the spray sheet, and discharges at a point above the latter, and collecting in the bottom of the chamber the solids precipitated from .the spray sheet, substantially as described.

4. A method of obtaining in desiccated condition the solid constituents of liquids,

which consists in dispersing the liquid in a substantially horizontal sheet 'of spray and passing'through principally the margin of the spray sheet a slowly upward moving curas which consists in leading the .liquid to t e center of the upperportion of ,a chamber, and there dispersing it outward rent of a desicc'ating gaseous agent through which the solid particles in the spray fall by gravity, substantially as described.

5. method of obtaining in desiccated condition the solid constituents. of liquids, which consists in dispersing the liquid in a substantially horizontal sheet of spray and passing through principally the margin of the spray sheet a slowly upward moving current of a desiccating gaseous agent through which the solid articles in" the spray fall by gravity, an collecting the desiccated solids at a point below the inlet of the gaseous agent, substantially as described.

"-In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

,GEORG ALEXANDER 'KRAUSE.

Witness:

ARTHUR ABBo'r'r. 

